Jean-Marc Doussain's late penalty at the weekend condemned Scotland to a defeat at home by France in a game Johnson believes they should have "won convincingly".

"We've got to look at ourselves and we've got to be clear - there are some errors in our game, there's no doubt about it," the coach told BBC Scotland, complaining about the "ambiguity" in applying the rules.

"What frustrates coaches like myself is the fact that the consistency of the referees is not being applied to both parties."

Johnson, who will concentrate on his director of rugby role from the summer, has been in temporary charge of Scotland while prospective head coach Vern Cotter runs down his contract with French top-flight outfit Clermont Auvergne.

The penalty count aside, the Australian believes he will had over the reins to an improving Scotland.